Four novel bridged dianilines containing fluorine were synthesized using 4-chloro-3, 5-dinitrobenzotrifluoride and diamine by two step condensation and reduction. The structures of corresponding compounds were determined by means of IR, NMR and elemental analysis.
Hydrophobic-hydrophilic macroporous polydivinylbenzene/polymethylacrylethylenediamine IPN (PDVB/PMAEM IPN) was synthesized indirectly through the strong forced compatibility. The effects of the hydrophobicity of adsorbate on the adsorption of salicylic acid and 5-sulfosalicylic acid onto the hydrophobic-hydrophilic PDVB/PMAEM IPN were investigated. PDVB/PMAEM IPN exhibited greater adsorption capacity of salicylic acid than that of 5-sulfosalicylic acid. The absolute values of Delta H, Delta G and Delta S of the adsorption of salicylic acid onto PDVB/PMAEM IPN were greater than those of 5-sulfosalicylic acid, indicating the adsorption of salicylic acid onto PDVB/PMAEM IPN was more welcome. Adsorption mechanism proved that greater adsorption capacity of salicylic acid onto PDVB/PMAEM IPN than that of 5-sulfosalicylic acid was attributed to the stronger hydrophobicity of salicylic acid. (C) 2016 Elsevier B.V. All rights reserved.
Catalytic synthesis of isoamyl formate, isoamyl acetate, isoamyl propionate, isoamyl butyrate, isoamyl isobutyrate and isoamyl isovalerate is composed with sodium bisulfate monohydrate. The reusability of the catalyst was researched. This method has the advantages of simple operation, mild reaction conditions, high purity and yield of the product.
Journal of Xiangtan Normal University (Natural Science Edition),2003年(01):84-86 ISSN：1671-0231
The catalytic synthesis of ethylene glycol monoether acetate using cation ion exchange resin, TiO2/SO42- to be carried by molecular sieves, rare-earth salt, pillared clay et al as catalysts are described in detail. The optimum reaction conditions of the synthesis of ethylene glycol monomethyl ether acetate catalyzed by sodium bisulfate was probed. The results have proved that sodium bisulfate is good catalyst for synthesis of ethylene glycol monomethyl ether acetate, and it little amount of use, high yield, convenient to operate.
Benzil is an important photosensitive initiator of organic synthesis intermediates,medicinal intermediates and ultraviolet solidified resin (UVresin),and is usually prepared by oxidizing benzoin, The oxidizers and methods reported are mainly;(PhCH_2Et_3N)~+Br~-/(PhCO)_2O_2/MeCN~,DMSO/(COCL)_2 CH_2CL_2~,CrO_3·CH_3NH_2·HCl/Al_2O_3~, the metallorganic compound~,microwave radiation~,etc.The reaction conditions of some methods are harsh, the toxicity is heavy, the reaction reagent is expensive, the preparation is difficult, the aftertreatment is tedious or the conversion ratio of materials is low.Cupric compound is a kind of weak oxidizer.Up till now there is only the report of oxidizing benzoin with cupric sulfate-pyridine~ with cupric acetate-acetic acid~.This paper studies the problem of oxidizing benzoin by using cupric nitrate, cupric chloride, cupric sulfate,cupric acetate and cupric subcarbonate as oxidizers.The experimental results indicate that these cupric compounds can all oxidize benzoin into benzil in acetic acid solutions, and cupric nitrate is the best one.Its product has these adventages of fine color and luster,high yield, available raw material and simple and easy operation and it has the prospects of being used widely.